Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [reclass] dbs, msg: Inherit only infra classes

    All other VCP nodes (mdb, prx, ctl etc.) inherit only the infra
    subdir of each scenario, so apply the same to dbs, msg.

    This should cut down some operations during reclass interpolation
    for affected nodes, without any changes in output pillar data.

    Change-Id: I77ae6e1d5658cba87fcd8c45a5f8f5e177e0eda9
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
  - [reclass] Update copyright year

    Change-Id: Id1ca66938531e1d24ec0d44194f8b09643062944
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index fec125f..55a4730 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit fec125fbd714de2b9c2f55de610e2e70ed5b5706
+Subproject commit 55a4730a03b523ced440a82a7e8bd26e156bb714